Not sure about it having anything to do with council caro, but the press are raking it up again, and this article is doing the rounds on FB - an article from DT from 2011. The comment ahead of the post on this thread

Thieves and money launderers, and tax cheat's....The Duke never personally owned Sunninghill.* The lease on Sunninghill was in the Queen’s name.* Royal advisers paid just over £12,000 to buy the freehold of the property from the Crown Estate, which had owned it for the benefit of the nation.* The Queen’s personal lawyer and her most senior financial adviser, not Prince Andrew, signed off on the sale to the new Kazahk owner... Then Andrew dodged and didn't pay any tax.